(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "Atari SC1224 Schematic (1986)(Atari)"

SCHEMATIC DIAGRAM 



CA-3 CHASSIS SCHEMATIC DIAGRAM 






■MUTANT SAFETY WTVE 

Tl€ COMPONENT BENT«0 BY SMAOMG OR THE WTERNATMNAL 
SYHMlA ON TMS SOCMATC OUfcGRAM MCORPORATES SPECIAL 

FEATURES MPORTANT FOR PROTECTION FROM X-RAflLATWKFK AM) 
ELECTRICAL SMOCK HAZARDS. WHEN SERVUNG IT IS ESSENTIAL THAT 
ONLY MANUFACTURER'S SPEC«D FARTS RE USED FOR THOSE CRTTCAL 



NOTES: UNLESS OTHERWISE SPECFCD 
1 ALL RESISTORS ARE t/IW, 

♦5* VALUES m OHMS G* tt* 

K.\|lf M.iHMH 
I ALL CAPACITORS ARE SHOWN 

m p.irV 

1 CO* 

UNIT OFMDUCTANCE IS *H 




WM 




1*»± 



Wfl 



7SV* 



WfJ 





7 4* 



WU 



WfS 



Wf4 



wn 



WFI 



Mi Ml JWl -ff- \T 




4t*-» 



uw 



WW 



17V, 



4|*^ 




4 7Vr 



WfH 



nn 



ZJVr 



wfh 



WFQ 






WF13 




llW-f 



4jVr-r 



tff« 






S4W 



WF» 



~nrinr Ki 



)tw 



14W<f 



4fW-» 



P/IM 484-257A 



TIMING CHART 



HORIZONTAL TIMING 



VIDEO 



SYNC. 



10.5uS 

4 * 



1uS 



5uS 

M 




!4.5uS 



15.75KHZ (63.5uS) 



VERTICAL TIMING 



VIDEO 



SYNC. 



1.39601S 



0.19mS 



L184mS 



0.1 9mS 



1.016mS 



12.7ms 



1.41mS 



60Hz (16.69mS) 



S* 



* NOTES 

1. SIGNAL INPUT LEVEL: lVp-p 

2. TIME TOLERANCE: ±0.1% 

3. THE MONITOR IS ADJUSTED ACCORDING TO THE ABOVE TIMINGS AND FREQUENCY. 



TROUBLE SHOOTING CHART 



A. NO CHARACTER 



DISCONNECTED 

P304 



NO CHARACTER 



TURN THE BRIGHTNESS 

CONTROL CLOCKWISE 

TO THE EXTREME 




TROUBLE 
IN VIDEO 
DRIVE CIRCUIT 
(Q301-Q324) 



NO 



YES 



RK,GK,BK 



ABOUT 45Vpp 

YES 

ABOUT 2.5Vpp 



ABOUT 2.5Vpp 



NO 



NO RASTER 



REFER TO 
NO RASTER 



CHECK 

PERIPHERAL 
CIRCUIT OF CRT 



CHECK 

A10 POINT 
VOLTAGE 

115V 



YES 



CHECK 

A9 POINT 
VOLTAGE 12 V 



NO 



TROUBLE 
IN P707 
or R363 



NO 



TROUBLE 
IN P30S 



YES 



TROUBLE 

IN VIDEO 

OUTPUT 
(QS01-Q506) 



TROUBLE 
IN R732 
orD709 



K. NO SOUND 




NO 



TROUBLE IN 
R732 or D709 
TROUBLE IN FBT 



NO 



TROUBLE IN 
POWER SUPPLY 



NO 



TROUBLE IN 
SIGNAL CABLE 



NO 



TROUBLE IN P404 



B, NO POWER 



NO 
POWER 



CHECK 

P962 (115V)? 



ABNORMAL 



CHECK 

FUSE OK? 

(ACV) 



NO 



TROUBLE IN 
FUSE (3. ISA) 



YES 



CHECK 

BD901<DCV)7 



NO 



TROUBLE IN 
KBL06 



YES 



CHECK 
IC950 01 (D 



NO 



TROUBLE IN 
STR-41090 

TRANS 



YES 



CHECK 
Q950 (KTC2120) 



C NO RASTER 




INE 

SRIGHTNESS CONTROl 
CLOCKWISE TO THE 
EXTREME 



WHOLE * 
SCREEN BRIGHT 



NO 



CHECK 

BETWEEN HI AND H2 

VOLTAGE 

ABOUT 6.3V r.m.s 



REFER TO TROUBLE 

IN HORIZONTAL CIRCUIT 



CHECK 
G2 VOLTAGE 

ABOUT 450V 



NO 



TROUBLE IN FBT 



YES 



CHECK 

A10 VOLTAGE 
115V7 



Y$S 



NO 



TROUBLE IN P707 
ORR363 



IF TURN 
THE SUB BRIGHTNESS 

CONTROL (742) 

CLOCKWISE SCREEN 

BRIGHT? 



NO 



NO HIGH VOLTAGE. 
TROUBLE IN FBT 



YES 



RASTER OK 



C-l. TROUBLE IN HORIZ OUT CIRCUIT 



_tltl 



2-8V W 



TROUBLE IN 
D702 

TROUBLE IN 
POWER SUPPLY 



TROUBLE IN HORIZ. 
OUT PUT CIRCUIT 

(NO RASTER) 



REPLACE 
R730 



TROUBLE IN 
POWER SUPPLY 



TROUBLE 
INFBT 




TROUBLE IN 
Q703 SHORT 



NO 




YES 



TROUBLE IN 

Q702.T701 



TROUBLE IN 
Q701, R704 



REFER TO 
TROUBLE IN 
POWER SUPPLY 



TROUBLE IN 
IC701 



TROUBLE IN IC101 
HIGH VOLTAGE CIRCUIT 
or SHUT DOWN CIRCUIT 



D. 



DOES NOT APPEAR 
SPECIHC COLOR 




INPUT SIGNAL 
CABLE or 
LOGIC SIDE 



TROUBLE 
IN 115V LINE 



TROUBLE IN 
VIDEO OUT PUT 
TRANSISTOR (QSC1-Q506) 



TROUBLE IN 
RS10, R511 
R512 



CHECK Cl,G2 

VOLTAGE 

G1-ABOUT-55V 

C2-ABOUT-340V 



TROUBLE 
FBT 



NO 




ABOUT 4.5Vp-p 



E. NO HORIZONTAL SYNC 



NO HORIZONTAL SYNC, 




I 



CHECK INPUT SIGNAL \ 
LEVEL AND TIMING OF \ 
P30l(|) / 

(HOR. SYNC SIGNAL) / 




TROUBLE IN 
IC7M 



NO 



TROUBLE IN 
SIGNAL CABLE 
or LOGIC SIDE 



YES 



ADJUST THE 
H-HOLD 



YES 




YES 



ABOUT3.2Vp-p 



F* NO VERTICAL SYNC. 



NO VERFICAL 
SYNC, 




I 



CHECK INPUT SIGNAL 

LEVEL AND TIMING OF 

P30l(6) 




YES 



W?1*-WF17 




NO 



TROUBLE IN 
SIGNAL CABLE or 
LOGIC SIDE 



YES 



ADJUST 
V.HOLD VR 



WF12-WF15 




G. CONVERGENCE IS BAD 




YES 




ADJUST STATIC 






CONVERGENCE 










ADJUST MENT ] 
OF CONVERGE?* 






YES 




ADJUST DY 








LOCATION 





H. FOCUSING PROBLEM 



FOCUSING IS 
NOT POSSIBLE 




NO 



NO 



ADJUST 
FOCUS VR 



REPLACE CRT 



I. VERTICAL PIN COMPENSATION (V.PCC) IS BIG 



VERTICAL PINCUSHION 
COMPENSATION (V-PCC) 
IS BIG 




NO 



ADJUST V-PCC 
CONTROL 



TROUBLE IN 
V-PCC CIRCUIT 
(V.DEF CIRCUIT) 



J. HORIZONTAL LINE 



HORIZONTAL LINE 



TROUBLE IN 
R731 or D708 
TROUBLE IN 
FBT 



NO 





YES 



YES 



CHECK 

VERT. OUTPUT 

OOl© 

WAVE FORM OK? 



TROUBLE IN 
IC701 



NO 



YES 



TROUBLE IN 
POWER SUPPLY 



CONFIRM DY OPEN